Geosynthetics in Flexible and Rigid Pavement Overlay Systems to Reduce Reflection Cracking.

摘要

Researchers selected six different state-of-the-art geosynthetic products, which include two fiberglass grid composites, two polyester grid composites, one fiberglass grid, and one polypropylene nonwoven fabric. These products were evaluated in the laboratory by measuring relative resistance to thermal cracking of an HMA/geosynthetic system. The Texas Transportation Institute (TTI) Overlay Tester, which accommodates 3-inch by 6-inch by 20-inch beam specimens, was used in this testing program. Researchers identified pavements in the Pharr, Waco, and Amarillo Districts for construction of test pavements. These districts will provide mild, moderate, and cold Texas climates, respectively, for evaluating geosynthetics.